Opponens digiti minimi muscle

Opponens digiti minimi muscle
Deep muscles of the right hand, palmar view.
Details
Origin	Hook of hamate and flexor retinaculum
Insertion	Medial border of 5th metacarpal (in hand, 3rd digit is orientation of mid-line)
Artery	ulnar artery
Nerve	deep branch of ulnar nerve (C8 and T1)
Actions	Draws 5th metacarpal anteriorly and rotates it, bringing little finger (5th digit) into opposition with thumb
Identifiers
Latin	musculus opponens digiti minimi (Old: Opponens quinti digiti)
Dorlands /Elsevier	m_22/12549964
TA	A04.6.02.064
FMA	37384
Anatomical terms of muscle []

The opponens digiti minimi (opponens digiti quinti in older texts) is a muscle in the hand. It is of a triangular form, and placed immediately beneath the palmaris brevis, abductor minimi digiti, and flexor brevis minimi digiti. It is one of the three hypothenar muscles that controls the little finger.

It arises from the convexity of the hamulus of the hamate bone, and contiguous portion of the transverse carpal ligament; it is inserted into the whole length of the metacarpal bone of the little finger, along its ulnar margin.

Opponens minimi digiti serves to flex and laterally rotate the 5th metacarpal about the 5th carpometacarpal joint, as when bringing little finger and thumb into opposition. It is innervated by the deep branch of the ulnar nerve.

The muscles of the thumb. (Opponens quinti digiti visible at center right.)

Front of the left forearm. Deep muscles. (Opponens digiti quinti visible at bottom left.)

Bones of the left hand. Volar surface.

Transverse section across the wrist and digits.

Opponens digiti minimi

Opponens digiti minimi

Opponens digiti minimi muscle

Muscles of hand. Cross section.

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)